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“Burning Ship” fractal

paulbourke.net

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Re: “Burning Ship” fractal

#61
post #42

Question: Do fractals have projective duals? In the projective plane RP^2, the dual of a point is a line, and vice versa. Do fractals like "Burning Ship" and "Mandelbrot" have projective duals, where each point in the set is replaced with a line? What would these look like?

I think Julia sets are perhaps what you are looking for.

Re: “Burning Ship” fractal

#62
post #49
post #5

Great YouTube video of a deep zoom: https://www.youtube.com/watch?v=2S3lc2G3rWs

What's the trick to implement a zoom like this in software? I remember many years ago implementing a trivial program to display the mandelbrot fractal, but as you zoomed in you quickly ran out of precision even if you used 64bit double floats. Is it just using "bignums" behind the scenes or is there a trick to "reset" the exponent due to the fractal nature of the display? I always wondered if, thanks to the self-simi…

I'm a noob in this kind of stuff but maybe they're using fixed-point math and dynamically redefining the scaling to always have enough precision? But then if you do use fixed point you could as well use integer big numbers. Though I imagine that using any form of big numbers, int or float, is going to hurt the performance more and more as you zoom further. You may also be able to use the rule that you can multiply or divide both sides of an equation by the same number and it will remain valid.

Re: “Burning Ship” fractal

#63
post #24

Earlier quoted context omitted.

Complex conjugation is non-holomorphic and yes, it's ugly. I still don't see why it being useful as a construction makes it a beautiful operation in analysis given that it isn't algebra. There are holomorphic split-complex functions and they aren't uninteresting at all - they are quite beautiful and complex, relating to wave equations: https://en.wikipedia.org/wiki/Motor_variable#D-holomorphic_f... They're not someth…

A holomorphic function over the split-complex numbers is the direct sum of two holomorphic functions over R. In that sense, it's trivial. You will be very disappointed once you see the split-complex Mandelbrot set. It will be an instructive exercise for you to see why it looks the way it does. My point about complex conjugation is illustrated in [1]. Linear algebra over the complex numbers does not limit itself to th…

Linear algebra uses the Hermitian adjoint [1], sure, but how often do we graph or build functions out of it for analysis purposes? I understand that it is useful in formulating equations, relations, etc.

Linear algebra does a lot of things, ie. transpose, that aren't algebraic. I think it's important we understand what is computational versus algebraic. In that vain, linear algebra proves to be immensely useful, but we will trip ourselves if we start thinking certain aspects of it are analytic.

Anyhow, point taken, that image hardly looks interesting.

I think we agree and like you said, are just talking about aesthetics. I agree that the utility of math doesn't end at algebra or analyticity.

https://en.wikipedia.org/wiki/Hermitian_adjoint

Re: “Burning Ship” fractal

#64

These kind of fractal have actually 4 dimentional structure since c_x and c_y can also be parameters. I'd love to see their slice as 3D, but have yet to find a good way to visualize them... https://i.imgur.com/JRfLy6R.mp4

Here you can interactively explore the 4d mother of the Mandelbrot fractal and all its Julia fractals:

https://rawgit.com/MatthiasHu/FractalsWebGL/4d/page.html

Re: “Burning Ship” fractal

#65
post #38

Earlier quoted context omitted.

Complex conjugation is non-holomorphic and yes, it's ugly. I still don't see why it being useful as a construction makes it a beautiful operation in analysis given that it isn't algebra. There are holomorphic split-complex functions and they aren't uninteresting at all - they are quite beautiful and complex, relating to wave equations: https://en.wikipedia.org/wiki/Motor_variable#D-holomorphic_f... They're not someth…

Here's the split-complex Mandelbrot (and Mandelbar for comparison): https://imgur.com/a/j2c7qkB Read my other reply.

Thank you.

Re: “Burning Ship” fractal

#66
post #53

Earlier quoted context omitted.

Just curious - do you have a script that finds related posts for each submission or do you rely on your memory, Dang?

Kind of a script, but not quite. Here's a pointer to past explanations: https://news.ycombinator.com/item?id=29370676 . Edit: or, to dereference all the way: https://news.ycombinator.com/item?id=26158300 .

If it helps any, here's the post you made that describes it most simply without needing to go 5 or 6 levels deep of self reference to the same question: https://news.ycombinator.com/item?id=26156901

(I had to click a lot of "here's a post where I explained it before" links that had "here's a post where I explained it before" before I found this one)

Re: “Burning Ship” fractal

#68
post #53

Earlier quoted context omitted.

Kind of a script, but not quite. Here's a pointer to past explanations: https://news.ycombinator.com/item?id=29370676 . Edit: or, to dereference all the way: https://news.ycombinator.com/item?id=26158300 .

If it helps any, here's the post you made that describes it most simply without needing to go 5 or 6 levels deep of self reference to the same question: https://news.ycombinator.com/item?id=26156901 (I had to click a lot of "here's a post where I explained it before" links that had "here's a post where I explained it before" before I found this one)

I think you mean https://news.ycombinator.com/item?id=26158300 as Umberto Eco's been dead since 2016 and probably did not moderate HN while alive.

Re: “Burning Ship” fractal

#69
post #53

Earlier quoted context omitted.

Kind of a script, but not quite. Here's a pointer to past explanations: https://news.ycombinator.com/item?id=29370676 . Edit: or, to dereference all the way: https://news.ycombinator.com/item?id=26158300 .

If it helps any, here's the post you made that describes it most simply without needing to go 5 or 6 levels deep of self reference to the same question: https://news.ycombinator.com/item?id=26156901 (I had to click a lot of "here's a post where I explained it before" links that had "here's a post where I explained it before" before I found this one)

Ok, I'll add that above. Thanks!

Re: “Burning Ship” fractal

#70
post #53

Earlier quoted context omitted.

Just curious - do you have a script that finds related posts for each submission or do you rely on your memory, Dang?

Kind of a script, but not quite. Here's a pointer to past explanations: https://news.ycombinator.com/item?id=29370676 . Edit: or, to dereference all the way: https://news.ycombinator.com/item?id=26158300 .

Neat - thanks for the description!
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